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www.hannainst .com

MultiparameterpH/ORP/C

EC/TDS/NaClBench Meter

HI 2550

Instruction Manual

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TABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTS

WARRANTY .................................................................................................... 2PRELIMINARY EXAMINATION ............................................................................ 3GENERAL DESCRIPTION.................................................................................... 3FUNCTIONAL DESCRIPTION .............................................................................. 4SPECIFICATIONS ............................................................................................. 5OPERATIONAL GUIDE ....................................................................................... 7AUTO-RANGING .............................................................................................12pH CALIBRATION .......... ............ ............ ............ ............ ............ ............ .......... 13pH BUFFER TEMPERATURE DEPENDENCE ........... ............ ........... ............ ........... 18RELATIVE mV CALIBRATION. ............ ............ ........... ............ ............ ............ ...... 19ECS/TDS CALIBRATION ............ ............ ............ ............ ............ ............ ............ 19CONDUCTIVITY VERSUS TEMPERATURE CHART .......... ........... ............ ........... ....... 21NaCl CALIBRATION ......................................................................................... 22GOOD LABORATORY PRACTICE (GLP) ........... ............ ............ ........... ............ ....... 23

LOGGING FUNCTION........... ........... ............ ............ ........... ............ ............ ...... 28SETUP ..........................................................................................................36TEMPERATURE CALIBRATION (FOR TECHNICAL PERSONNEL ONLY) ............ ........... 42mV CALIBRATION (FOR TECHNICAL PERSONNEL ONLY)........ ............ ........... ........ 44PC INTERFACE ...............................................................................................45ELECTRODE CONDITIONING & MAINTENANCE ............ ............ ............ ............ .... 51TROUBLESHOOTING GUIDE. ............ ............ ........... ............ ............ ............ ...... 54TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS ........... ............ ............ .. 55ACCESSORIES ...............................................................................................56

WARRANTY WARRANTY WARRANTY WARRANTY WARRANTY

HI 2550 is guaranteed for two years against defects in workmanship and

materials when used for their intended purpose and maintained accordingto instructions. Electrodes and probes are guaranteed for six months.Thiswarranty is limited to repair or replacement free of charge.

Damage due to accidents, misuse, tampering or lack of prescribedmaintenance is not covered.

If service is required, contact the dealer from whom you purchased theinstrument. If under warranty, report the model number, date ofpurchase, serial number and the nature of the problem. If the repair isnot covered by the warranty, you will be notified of the charges incurred.If the instrument is to be returned to Hanna Instruments, first obtaina Returned Goods Authorization number from the Technical Servicedepartment and then send it with shipping costs prepaid. When shippingany instrument, make sure it is properly packed for complete protection.

Dear Customer,Thank you for choosing a Hanna Instruments product.Please read this instruction manual carefully before using this instrument.This manual will provide you with the necessary information for correctuse of this instrument, as well as a precise idea of its versatility.If you need additional technical information, do not hesitate to e-mail usat [email protected].

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GENERAL DESCRIPT IONGENERAL DESCRIPT IONGENERAL DESCRIPT IONGENERAL DESCRIPT IONGENERAL DESCRIPT ION

The HI 2550 is a microprocessor based pH, ORP, Conductivity (EC), TDS,NaCl, and Temperature Bench Meter. Relative mV feature is alsoprovided.pH measurements are compensated for temperature effect manually orautomatically with the HI 7662 temperature probe.Up to a five-point pH calibration can be performed using seven standardbuffers and two custom buffers.

A calibration due alarm can be set to alert the user that too much timehas elapsed since the last pH calibration.

Conductivity and TDS features auto-ranging, which automatically selectsthe scale with the highest resolution. Conductivity measurements arecompensated for temperature manually or automatically with atemperature sensor located inside the probe. The temperature coefficientis user selectable. Temperature compensation can be disabled to measureactual conductivity.

The GLP feature provides data consistency.

Data can be stored in the meters memory for later retrieval. The metersmemory can hold 200 manually logged points and 500 lot loggingpoints.

An USB connection ensures communication with a PC.

PREL IMINARY EXAMINATIONPREL IMINARY EXAMINATIONPREL IMINARY EXAMINATIONPREL IMINARY EXAMINATIONPREL IMINARY EXAMINATIONRemove the instrument from the packing material and examine it carefullyto make sure that no damage has occurred during shipping. If there is anydamage, notify your Dealer or the nearest Hanna Customer Service Center.Each instrument is supplied with:

HI 1131B Glass-body Combination pH Electrode with 1 m (3.3')Cable

HI 76310 Conductivity / TDS probe HI 7662 Temperature Probe

HI 76404N Electrode Holder

pH 4.01 & 7.01 Buffer Solutions (20 mL each) HI 7071 Electrolyte Solution

12VDC Power Adapter

Instruction Manual

Note: Save all packing material until you are sure that the instrumentfunctions correctly. All defective items must be returned in theoriginal packing with the supplied accessories.

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1) Liquid Crystal Display (LCD).2) CAL key, to enter and exit calibration mode.

RCL key (alternate function), to enter and exit memory recall.

3) CFM/GLP key, to confirm calibration selection, different setup valuesor to display Good Laboratory Practice information.

4) C key, to manually increase temperature value or other parameters.TC key (alternate function), to view temperature coefficient value.

5) C key, to manually decrease temperature value or other parameters.ATC key (alternate function), to select EC temperature compensation mode.

6) SETUP key, to enter/exit SETUP mode.LOCK key (alternate function), to freeze current EC range on the LCD.

7) RANGE key, to select measurement range (pH, mV, EC), switch tofocused data in SETUP or toggle between buffer value and temperatureduring calibration.MODE key (alternate function) to select mV or Rel mV on mV rangeor EC, TDS, NaCl on EC range.

8) LOG/CLR key, to store a value into memory, to clear pH calibration,

or to select to delete log records or lots.9) ALT key, to select alternate function.10) ON/OFF switch.11) Power supply socket.12) USB connector.13) EC electrode connector.14) BNC electrode connector.15) Temperature probe socket.16) Electrode reference socket.

FUNCTIONAL DESCRIPT IONFUNCTIONAL DESCRIPT IONFUNCTIONAL DESCRIPT IONFUNCTIONAL DESCRIPT IONFUNCTIONAL DESCRIPT ION

Front Panel

Rear Panel

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SPECIF ICAT IONSSPECIF ICAT IONSSPECIF ICAT IONSSPECIF ICAT IONSSPECIF ICAT IONS

EGNAR

Hp0.61ot0.2Hp00.61ot00.2

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Hp1.0Hp10.0Hp100.0

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10.0 mc/S

1.0 mc/S1 mc/S

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(*) Uncompensated conductivity (or TDS) is the conductivity (or TDS) value withouttemperature compensation.

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3 cm(1")

OPERATIONAL GUIDEOPERATIONAL GUIDEOPERATIONAL GUIDEOPERATIONAL GUIDEOPERATIONAL GUIDE

POWER CONNECTIONPOWER CONNECTIONPOWER CONNECTIONPOWER CONNECTIONPOWER CONNECTION

Plug the 12 VDC adapter into the power supply socket.

Notes: This instrument uses non volatile memory to retain the calibrationparameters and all other settings, even when unplugged.

Make sure a fuse protects the main line.

ELECTRODE AND PROBE CONNECTIONSELECTRODE AND PROBE CONNECTIONSELECTRODE AND PROBE CONNECTIONSELECTRODE AND PROBE CONNECTIONSELECTRODE AND PROBE CONNECTIONS

For pH or ORP measurements connect an electrode with internal reference

to the BNC connector on the back of the instrument.For electrodes with a separate reference connect the electrodes BNC to theBNC connector and the reference electrode plug to the reference socket.

For temperature measurements and automatic temperature compensationconnect the temperature probe to the appropriate socket.

For EC/TDS measurements connect the probe to the 7-pin connector.Make sure the probe sleeve is properly inserted.

INSTRUMENT STINSTRUMENT STINSTRUMENT STINSTRUMENT STINSTRUMENT STAR TAR TAR TAR TAR T-UP-UP-UP-UP-UP

Turn the instrument on by pressing the ON/OFF switch located onthe rear panel.

All LCD tags are displayed and a beep is sounded while theinstruments perform a self test.

The instrument will display LoAd message and blinking untilinitialization is complete.

Notes: The instrument starts in the same range and mode as it wasat power off.

The ALT&MODE keys change the measuring modes:

- mV or Rel mV

- EC or TDS or NaCl

The RANGE key toggles between measurement ranges:

- pH, mV or Rel mV, EC or TDS or NaCl.

pH MEASUREMENTS

Make sure the instrument has been calibrated beforetaking pH measurements.

Submerse the electrode tip and the temperatureprobe approximately 3 cm (1) into the sampleto be tested and stir gently. Allow time for theelectrode to stabilize.

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3 cm(1")

The pH is displayed on the primary LCD and the temperature on the

secondary LCD.

If the reading is out of range, the closest full-scale value will be

displayed blinking on the primary LCD.

If measurements are taken successively in different samples, it is recommended

to rinse the electrode thoroughly with deionized water or tap water and

then with some of the next sample to prevent cross-contamination.

The pH reading is affected by temperature. In order to measure the pH

accurately, the temperature effect must be compensated for. To use the

Automatic Temperature Compensation feature, connect and submerse

the HI 7662 temperature probe into the sample as close as possible to

the electrode and wait for a few seconds.

If the temperature of the sample is known, manual temperature

compensation can be used by disconnecting the temperature probe.The display will show the last temperature reading with

the C tag blinking.

The temperature can now be adjusted with the ARROW

keys (from 20.0 C to 120.0 C).

mV/ORP MEASUREMENTSmV/ORP MEASUREMENTSmV/ORP MEASUREMENTSmV/ORP MEASUREMENTSmV/ORP MEASUREMENTS

An optional ORP electrode must be used to perform ORP measurements

(see Accessories).

Oxidation-Reduction Potential (REDOX) measurements provide the

quantification of the oxidizing or reducing power of the tested sample.

The surface of the ORP electrode must be clean and smooth in order to

obtain an accurate measurement. Press RANGE to enter mV range.

Submerse the tip of the ORP electrode (3 cm/1)

into the sample to be tested and allow a few

seconds for the reading to stabilize.

pH

pH

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The instrument displays the mV reading on the primary LCD and thetemperature on the secondary LCD line.

If the reading is out of range, the closest full-scale value will bedisplayed blinking on the primary LCD.

RELATIVE mV MEASUREMENTSRELATIVE mV MEASUREMENTSRELATIVE mV MEASUREMENTSRELATIVE mV MEASUREMENTSRELATIVE mV MEASUREMENTS

Press the ALT&MODE keys simultaneously while in mV range. TherEL and mV tags are displayed for about one second. After onesecond the temperature will be displayed on the secondary LCD andthe mV tag will blink.

The reading displayed by the instrument is equal to the difference

between the current mV input value and the relative mV offset establishedin the relative mV calibration.

CONDUCTIVITY MEASUREMENTSCONDUCTIVITY MEASUREMENTSCONDUCTIVITY MEASUREMENTSCONDUCTIVITY MEASUREMENTSCONDUCTIVITY MEASUREMENTS

Connect the conductivity probe to the instrument.

Press the RANGE key to enter conductivity measurement range (EC).

Submerse the probe into the solution to be tested. Thesleeve holes must be completely submersed. Tap theprobe repeatedly to remove any air bubbles that maybe trapped inside the sleeve.

The conductivity value will be displayed on the primaryLCD and the temperature on the secondary LCD.

If the reading is out of range, the full-scale value (200.0 for MTC/ATCmode or 500.0 for actual conductivity) will be displayed blinking.

mV

mV

mV

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IfLOCK key was pressed and the reading goes out of range, thefull-scale value of the frozen range will be displayed blinking.

The conductivity reading is affected by temperature.

Three options for temperature compensation are available in conductivity

measurement mode.

Automatic (ATC): The conductivity probe has a built-in temperaturesensor; the temperature value is used to automatically compensate the

EC/TDS reading.

Manual (MTC): The temperature value, shown on the secondary LCD,

can be manually set with the ARROW keys. The C tag blinks when

this option is active. This value will be used to compensate the EC/TDS

reading.

No Compensation (notc): The temperature value is displayed, but nottaken into account. When this option is selected the C tag will blink

with slower frequency. The reading displayed on the primary LCD is the

uncompensated EC or TDS value.

To select the desired option, press the

ALT&ATC keys until the option is displayedon the LCD.

Notes: The default compensation mode is ATC.

If no temperature probe is detected, ATC mode can not be

selected and the instrument displays ---- on the secondary LCD.

If temperature compensation is selected, measurements are compensated

using the temperature coefficient (default value 1.90 %/C). To change

the temperature coefficient, enter the setup mode and select tc (see

SETUP for details, page 36). The current temperature coefficient can be

quickly viewed by pressing the ALT&TC keys. The value is briefly

displayed on the secondary LCD.

If the temperature reading exceeds the limits of the meter (20.0 Cto 120.0 C), the C tag will blink and the closest full scale value

will be displayed.

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TDS MEASUREMENTSTDS MEASUREMENTSTDS MEASUREMENTSTDS MEASUREMENTSTDS MEASUREMENTS

Press the ALT&MODE keys while in EC range. The instrument will switch

to TDS measuring range. The TDS reading will be displayed on the

primary LCD and the temperature reading on the secondary LCD.

If the reading is out of range, the full-scale value (100.0 for MTC/ATC

mode or 400.0 for uncompensated TDS) will be displayed blinking.

IfLOCK was pressed and the reading goes out of range, the full-scalevalue of the frozen range will be displayed blinking.

NaCl MEASUREMENTSNaCl MEASUREMENTSNaCl MEASUREMENTSNaCl MEASUREMENTSNaCl MEASUREMENTS

Press the ALT&MODE keys while in EC range until NaCl is displayed onthe LCD. The instrument will display the NaCl reading on the primary LCD

and the temperature reading on the secondary LCD line.

If the reading is out of range, the full-scale value (400.0%) will be

displayed blinking.

TEMPERATURE MEASUREMENTSTEMPERATURE MEASUREMENTSTEMPERATURE MEASUREMENTSTEMPERATURE MEASUREMENTSTEMPERATURE MEASUREMENTS

In pH and ORP mode, connect the HI 7662 temperature probe to the

appropriate socket.

Submerse the temperatureprobeinto the sample and allow the reading

on the secondary LCD to stabilize.

In EC/TDS/NaCl range, the HI 76310 probe has a built-in temperature

sensor.

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AUTO-RAN GINGAUTO-RANGINGAUTO-RAN GINGAUTO-RANGINGAUTO- RANGI NG

The EC and TDS scales are auto-ranging. The meter automatically sets

the scale with the highest possible resolution.

By pressing ALT&LOCK, the auto-ranging feature is disabled and thecurrent range is frozen on the LCD. The Auto Off (auto-ranging

disabled) tags will be displayed on the LCD for a few seconds. To restore

the auto-ranging option, press ALT&LOCK again. The Auto On(auto-ranging enabled) tags will be displayed on the LCD for a few

seconds.

Note: Auto-ranging is automatically restored if the range is changed, if

the setup or calibration modes are entered and if the meter is

turned off and back on again.

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ppppp H CALIBRATIONH CALIBRATIONH CALIBRATIONH CALIBRATIONH CALIBRATION

Calibrate the instrument frequently, especially if high accuracy is required.

The instrument should be recalibrated:

Whenever the pH electrode is replaced.

At least once a day.

After testing aggressive chemicals.

If CAL INTV tags are blinking during measurement.Every time you calibrate the instrument use fresh buffers and perform anelectrode Cleaning Procedure (see page 53).

PREPARATIONPREPARATIONPREPARATIONPREPARATIONPREPARATIONPour small quantities of the buffer solutions into clean beakers. If possible,use plastic or glass beakers to minimize any EMC interferences.

For accurate calibration and to minimize cross-contamination, use twobeakers for each buffer solution. One for rinsing the electrode and one forcalibration.

If you are measuring in the acidic range, use pH 7.01 or 6.86 as first bufferand pH 4.01 as second buffer. If you are measuring in the alkaline range,

use pH 7.01 or 6.86 as first buffer and pH 10.01 or 9.18 as second buffer.

PROCEDUREPROCEDUREPROCEDUREPROCEDUREPROCEDURE

Calibration can be performed at up to five-points.

For accurate measurements, a three-point calibration is recommended.The calibration buffer can be selected from the calibration buffer list thatincludes the custom buffers and the memorized standard buffers:

pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45

The custom buffers allow the user to calibrate in a buffer solution differentfrom a standard one. Up to two custom buffers can be se t in SETUP menu(see page 36). Each custom buffer value can be changed in a 1.0 pHwindow around the set value, during calibration, when it is selected; theBUFFER pH tag will blink.

The instruments will automatically skip the buffer used during calibrationand the buffers which are in a 0.2 pH window, around one of thecalibrated buffers.

All new calibrations will override existing stored calibration data in a0.2 pH window. The slopes adjacent to the new points will bereevaluated.

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3 cm(1")

FIVEFIVEFIVEFIVEFIVE-----POINTPOINTPOINTPOINTPOINT CALIBRATIONCALIBRATIONCALIBRATIONCALIBRATIONCALIBRATION

Submerse the pH electrode and the temperatureprobe approximately 3 cm (1) into a buffersolution and stir gently. The temperature probeshould be close to the pH electrode.

Press CAL. The CAL and BUF tags willappear and the 7.01 buffer will be displayedon the secondary LCD.

If necessary, press the ARROW keys to select a different buffer value.

The tag will blink on the LCD until the reading is stable.

When the reading is stable and close to the selectedbuffer, the READY tag will be displayed and theCFM tag will blink.

Press CFM to confirm calibration.

The calibrated value is then displayed on the primaryLCD and the second expected buffer value on thesecondary LCD.

After the first calibration point is confirmed, submerse the pHelectrode and the temperature probe approximately 3 cm (1)

into the second buffer solution and stir gently. The temperatureprobe should be close to the pH electrode.


The tag will blink on the LCD until the reading is stable.



The calibrated value is then displayed on the primaryLCD and the third expected buffer value on thesecondary LCD.

After the second calibration point is confirmed, submerse the pHelectrode and the temperature probe approximately 3 cm (1) intothe third buffer solution and stir gently. The temperature probeshould be close to the pH electrode.

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The tag will blink on the LCD until the reading isstable.



The calibrated value is then displayed on the primary LCD and thefourth expected buffer value on the secondary LCD.

After the third calibration point is confirmed, submerse the pH electrode

and the temperature probe approximately 3 cm (1) into the fourthbuffer solution and stir gently. The temperature probe should be closeto the pH electrode.





The calibrated value is then displayed on the primary LCD and thefifth expected buffer value on the secondary LCD.

After the fourth calibration point is confirmed, submerse the pHelectrode and the temperature probe approximately 3 cm (1) intothe fifth buffer solution and stir gently. The temperature probeshould be close to the pH electrode.




Press CFM to confirm the fifth calibration point.

The instrument stores the calibration value and returns to normalmeasurement mode.

FOUR, THREE OR TWO-POINT CALIBRATIONFOUR, THREE OR TWO-POINT CALIBRATIONFOUR, THREE OR TWO-POINT CALIBRATIONFOUR, THREE OR TWO-POINT CALIBRATIONFOUR, THREE OR TWO-POINT CALIBRATION

Proceed as described in FIVE-POINT CALIBRATION section.

Press CAL after the fourth, third or second calibration point wasconfirmed. The instruments will memorize the calibration data andreturn to measurement mode.

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ONE-POINT CALIBRATIONONE-POINT CALIBRATIONONE-POINT CALIBRATIONONE-POINT CALIBRATIONONE-POINT CALIBRATION

Two SETUP selectable options are available: Pnt and OFFS.

If the Pnt option is selected, the new calibration point overrides anexisting one. The adjacent slopes will be reevaluated.

If the OFFS option is selected, an electrode offset correction is performed.

The adjacent slopes will remain unchanged.

Proceed as described in FOUR, THREE or TWO-POINT CALIBRATIONsection.

Press CAL after the first calibration point was confirmed. Theinstruments will memorize the one-point calibration data andreturn to measurement mode.

Notes: If the value measured by the instrument is not close to the

selected buffer, WRONG and WRONG tagswill blink alternately. Check if the correct buffer has beenused, or clean the electrode by following the CleaningProcedure (see page 53). If necessary, change the buffer orthe electrode.

When a custom buffer is displayed, the BUFFER pH tagblinks. To change the custom buffer value in accordance withthe buffer temperature proceed as described in WORKINGWITH CUSTOM BUFFERS (see page 17).

If the buffer temperature or the manual temperatureexceeds the temperature limits of the buffer, WRONG tagand temperature reading will blink.

If WRONG, BUFFER pH tags and OLD message aredisplayed blinking on the secondary LCD line, an inconsistencybetween new and previous (old) calibration is detected.Clear calibration parameters and proceed with calibrationfrom the current calibration point. The instrument will keepall confirmed values during current calibration.

To clear calibration parameters for all uncalibrated buffersstarting with current buffer, press CLR. The calibration willcontinue from the current point. If this procedure is

performed while calibrating in the first calibration point,the instrument returns to measurement mode.

Press RANGE to toggle between pH buffer,calibration buffer number and temperaturereading.

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Each time a buffer is confirmed, the new calibration datareplaces the old calibration data for the corresponding buffer.If current buffer has no previous data stored and the cali-bration is not full (five buffers), the current buffer is addedto the existing calibration. If the existing calibration is full,the instrument asks which buffer to replace.

Press the ARROW keys to select another buffer to bereplaced.Press CFM to confirm the buffer that will be replaced.Press CAL to leave calibration without replacing.

Note: If the replaced buffer is outside the 0.2 pH window,around each of the calibrated buffers, it is possible toselect this buffer for next calibration during currentcalibration.

WORKING WITH CUSTOM BUFFERSWORKING WITH CUSTOM BUFFERSWORKING WITH CUSTOM BUFFERSWORKING WITH CUSTOM BUFFERSWORKING WITH CUSTOM BUFFERS

If a custom buffer was set in SETUP menu, it can be selected duringcalibration by pressing the ARROW keys. The BUFFER pH tag willblink.

Press SETUP if you want to adjust the buffer value. The buffer value will

start blinking.

Use the ARROW keys to change the buffer value.

After 5 seconds, the buffer value is updated. Press SETUP if you want tochange it again.

Note: Custom buffer value can be adjusted in a 1.00 pH window,around the set value.

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The temperature has an effect on pH. The calibration buffer solutions areaffected by temperature changes to a lesser degree than normal solutions.During calibration the instrument will automatically calibrate to the pHvalue corresponding to the measured or set temperature.

During calibration the instrument will display the pH buffer value at 25 C.

pppppH BUFFER TEMPERATUREH BUFFER TEMPERATUREH BUFFER TEMPERATUREH BUFFER TEMPERATUREH BUFFER TEMPERATUREDEP EN DEN C EDEP EN DEN C EDEP EN DEN C EDEP EN DEN C EDEP EN DEN C E

PMET SREFFUBHp

C F 86.1 10.4 68.6 10.7 81.9 10.01 54.21

0 23 76.1 10.4 89.6 31.7 64.9 23.01 83.31

5 14 76.1 00.4 59.6 01.7 93.9 42.01 81.31

01 05 76.1 00.4 29.6 70.7 33.9 81.01 99.21

51 95 76.1 00.4 09.6 50.7 72.9 21.01 08.21

02 86 86.1 00.4 88.6 30.7 22.9 60.01 26.21

52 77 86.1 10.4 68.6 10.7 81.9 10.01 54.21

03 68 86.1 20.4 58.6 00.7 41.9 69.9 92.21

53 59 96.1 30.4 48.6 99.6 11.9 29.9 31.21

04 401 96.1 40.4 48.6 89.6 70.9 88.9 89.11

54 311 07.1 50.4 38.6 89.6 40.9 58.9 38.11

05 221 17.1 60.4 38.6 89.6 10.9 28.9 07.11

55 131 27.1 80.4 48.6 89.6 99.8 97.9 75.11

06 041 27.1 90.4 48.6 89.6 79.8 77.9 44.11

56 941 37.1 11.4 48.6 99.6 59.8 67.9 23.11

07 851 47.1 21.4 58.6 99.6 39.8 57.9 12.11

57 761 67.1 41.4 68.6 00.7 19.8 47.9 01.11

08 671 77.1 61.4 78.6 10.7 98.8 47.9 00.11

58 581 87.1 71.4 78.6 20.7 78.8 47.9 19.01

09 491 97.1 91.4 88.6 30.7 58.8 57.9 28.01

59 302 18.1 02.4 98.6 40.7 38.8 67.9 37.01

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RELATIVERELATIVERELATIVERELATIVERELATIVE mmmmmV CAL IBRATIONV CALIBRATIONV CAL IBRATIONV CALIBRATIONV CALIBRATION

Press CAL when the instrument is in RELATIVE mV measurementmode. The mV and tags will be displayed. Absolute mV isdisplayed on the primary LCD and AbS message is displayed on thesecondary LCD.

When the absolute reading is stable and in measurement range, theinstrument asks for confirmation.

If the reading is out of range, WRONG tag will be displayed.

Press CFM to confirm the absolute value. The instrument will display

0.0 mV on the primary LCD and rEL message on the secondaryLCD. In this moment the relative mV offset is equal to absolute mVreading.

Use the ARROW keys if you want to change the displayed relativemV value.

Press CFM to confirm the relative mV value. The instrument returnsto measurement mode.

Note: The relative mV value can be changed only inside the relative mVoffset window ( 2000 mV).

EC/TDS CAL IBRATIONEC/TDS CAL IBRATIONEC/TDS CAL IBRATIONEC/TDS CAL IBRATIONEC/TDS CAL IBRATION

Selectable calibration points for conductivity are 0.00 S for offset and84.0S, 1413S, 5.00 mS, 12.88 mS, 80.0 mS, 111.8 mS for slope.

Rinse the probe with calibration solution or deionizedwater. Submerse the probe into the solution. The sleeveholes must be completely submersed. Tap the proberepeatedly to remove any air bubbles that may be trappedinside the sleeve.To enter EC calibration, select the EC range and pressCAL.

The BUF and CAL tags are displayed. The primaryLCD will display the EC reading. The secondary LCD will display the value.The and ~ tags will blink.

Note: The TDS reading is automatically derived from the EC reading andno specific calibration for TDS is needed. Pressing CAL when TDSrange is selected has no effect.

For zero calibration, just leave the dry probe in the air. This calibrationis performed in order to correct the reading at 0.00 S. The slope isevaluated when the calibration is performed at any other point.

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Select the desired value with the ARROW keys, if necessary.

When the reading is stable, READY tag is displayed and CFM tag

starts blinking on the LCD, asking for confirmation.


The instrument stores the calibration value and returnsto measurement mode.

Notes: If the reading is too far from the expected value, the

WRONG and tags will blink. Calibration can not beconfirmed.

In this case check if the calibration solution has been used or

clean the probe by following the Cleaning Procedure (seepage 53).

If the meter is in ATC mode and the buffer temperature is

out of the 0.0 C to 60.0 C interval, WRONG C tagsand the temperature will blink.

For best results choose an EC buffer value close to the sample

to be measured.

In order to minimize any EMC interference, use plastic or

glass beakers.

It is possible to set the cell constant value directly, without

following the calibration procedure. To set the cell constant,enter SETUP mode and select CEL (see SETUP for details,page 36).

SBUF

CAL

SBUF

CAL

READY

CFM

WRONG

CAL

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CONDUCTIVITY VERSUSCONDUCTIVITY VERSUSCONDUCTIVITY VERSUSCONDUCTIVITY VERSUSCONDUCTIVITY VERSUSTEMPERATURE CHARTTEMPERATURE CHARTTEMPERATURE CHARTTEMPERATURE CHARTTEMPERATURE CHART

The conductivity of an aqueous solution is a measure of its ability to carry

an electrical current by means of ionic motion.

The conductivity invariably increases with increasing temperature.

It is affected by the type and number of ions in the solutions and by

the viscosity of the solution itself. Both parameters are temperature

dependent. The dependency of conductivity on temperature is

expressed as a relative change per Celsius degrees at a particulartemperature, commonly as %/C.

The following table lists the temperature dependence of HANNA EC

calibration buffers.

C F

0307IH

0308IH

( )mc/S

1307IH

1308IH

( )mc/S

3307IH

3308IH

( )mc/S

4307IH

4308IH

( )mc/S

5307IH

5308IH

( )mc/S

9307IH

9308IH

( )mc/S

0 23 0517 677 46 00384 00456 0672

5 14 0228 698 56 00535 00147 0813

01 05 0339 0201 76 00695 00238 5163

51 95 08401 7411 86 00456 00529 360461 8.06 02701 3711 07 00276 00449 5514

71 6.26 05901 9911 17 00586 00369 5424

81 4.46 09111 5221 37 00896 00289 7334

91 2.66 03411 1521 47 00317 002001 9244

02 86 07611 8721 67 00427 001201 3254

12 8.96 01911 5031 87 00047 000401 7164

22 6.17 05121 2331 97 00257 009501 1174

32 4.37 09321 9531 18 00567 009701 5084

42 2.57 04621 6831 28 00387 008901 2094

52 77 08821 3141 48 00008 008111 0005

62 8.87 03131 0441 68 00318 008311 6905

72 6.08 07331 7641 78 00038 007511 0915

82 4.28 02631 4941 98 00948 007711 682592 2.48 07831 1251 09 00368 007911 3835

03 68 02141 8451 29 00288 008121 9745

13 8.78 07341 5751 49 00009 009321 5755

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NaCl CAL IBRATIONNaCl CAL IBRATIONNaCl CAL IBRATIONNaCl CAL IBRATIONNaCl CAL IBRATIONNaCl calibration is a one-point calibration at 100.0% NaCl. Use the

HI 7037L calibration solution (sea water solution) as a 100% NaCl

calibration solution.

Rinse the probe with some of the calibration solution or

deionized water. Submerse the probe into HI 7037Lsolution. The sleeve holes must be completely submersed.

Tap the probe repeatedly to remove any air bubbles that

may be trapped inside the sleeve.

To enter NaCl calibration select the NaCl range and pressCAL.

The BUF and CAL tags are displayed. The primary LCD will display

the NaCl reading in percentage. The secondary LCD will display 100.

The and ~ tags will blink.

When the reading is stable, the READY tag will be displayed and the

CFM tag starts blinking on the LCD, asking for confirmation.


The instrument stores the calibration value and returns to

measurement mode.

Notes: If the reading is too far from the expected value, WRONG

tags will blink. Calibration cannot be confirmed.

If the temperature of the buffer is out of the 0.0 C to 60.0 C

temperature interval, the WRONG and C tags andthe temperature will blink.

If a new EC calibration is performed, the NaCl calibration isautomatically cleared. A new NaCl calibration is required.

BUF

CAL %

NaCl

%

BUF

READY

CFM

CAL

NaCl

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GOOD LABORATORY PRACTICE (GLP)GOOD LABORATORY PRACTICE (GLP)GOOD LABORATORY PRACTICE (GLP)GOOD LABORATORY PRACTICE (GLP)GOOD LABORATORY PRACTICE (GLP)

GLP is a set of functions that allows storage and retrieval of data

regarding the maintenance and status of the electrode.

All data regarding pH, Rel mV, EC and NaCl calibration is stored for the

user to review when necessary.

EXPIRED CALIBRATIONEXPIRED CALIBRATIONEXPIRED CALIBRATIONEXPIRED CALIBRATIONEXPIRED CALIBRATION

For pH calibration, this instrument allows the user to set the number of

days before the next required pH calibration. This value can be set from

1 to 7 days. The default setting is OFF (disabled).When calibration has expired the CAL and INTV tags will blink to

warn the user that the instrument should be recalibrated.

For example, if a 4 days time out has been selected, the instrument will

issue the alarm exactly 4 days after the last calibration.

If the expiration value is changed (e.g. to 5 days), then the alarm will

be immediately recalculated and appear 5 days after the last calibration.

Note: If the instrument was not calibrated, the CAL INTV tags will

be displayed even if the feature is disabled in SETUP menu.

pHpHpHpHpH CALIBRATION DATACALIBRATION DATACALIBRATION DATACALIBRATION DATACALIBRATION DATA

Calibration data is stored automatically after a successful calibration.

To view the pH calibration data, press GLP when the instrument is in pH(mV) measurement mode.

The instrument will display the time (hh:mm) of the last calibration.

Use the ARROW keys to scroll through the calibration data:

The date (yyyy.mm.dd).

The pH calibration offset.

mVCAL

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The pH calibration slope (the GLP slope is the average of the calibrationslopes; the percentage is referred to the ideal value of 59.16 mV/pH).

The calibration buffers in order.

The first pH calibration buffer:

The second pH calibration buffer:

The third pH calibration buffer:

The fourth pH calibration buffer:

The fifth pH calibration buffer:

Notes: The OLd message displayed beside the pH value meansthat this buffer was not used during last calibration. Pressand hold down the SETUP key if you want to see calibrationdate (or time if old calibration was performed on the sameday as the current calibration).

If no bUF message appears on the LCD, the instrumentinforms you that calibration was performed in less thanthree points.

CAL pH

BUF

CAL pH

BUF

CAL pH

BUF

BUF

CAL

Calibration Expiration status:

- if disabled.

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RRRRRelative mVelative mVelative mVelative mVelative mV CALIBRATION DATACALIBRATION DATACALIBRATION DATACALIBRATION DATACALIBRATION DATA

Relative mV calibration data is stored automatically after a successfulcalibration.

To view the Relative mV calibration data, press GLP when the instrumentis in Relative mV measurement mode.

The instrument will display the time (hh:mm) of the last calibration.

Use the ARROW keys to scroll through the calibration data:

The date (yyyy:mm:dd).

The Relative mV calibration offset.

The instrument ID.

INTVCAL

TIMECAL

- or the number of days until the calibration alarm will be displayed.

- or if expired (7 days ago).

The instrument ID.

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EC CALIBRATION DATAEC CALIBRATION DATAEC CALIBRATION DATAEC CALIBRATION DATAEC CALIBRATION DATA

EC calibration data is stored automatically after a successful calibration.

To view the EC calibration data, press GLP when the instrument is in ECmeasurement mode.The instrument will display the time (hh:mm) of the last calibration.

Use the ARROW key to scroll through the calibration data: The date (yyyy:mm:dd).

The EC calibration buffer.

The cell constant.

The calibration offset factor.

The reference temperature.

The temperature coefficient.

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The temperature compensation mode.

The instrument ID.

NNNNNaClaC laClaC laCl CALIBRATION DATACALIBRATION DATACALIBRATION DATACALIBRATION DATACALIBRATION DATA

NaCl calibration data is stored automatically after a successful calibration.To view the NaCl calibration data, press GLP when the instrument is inNaCl measurement mode.The instrument will display the time (hh:mm) of the last calibration.

Use the ARROW key to scroll through the calibration data:

The date (yyyy:mm:dd).

The salinity coefficient.

The cell constant.

The reference temperature.

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The instrument ID.

Notes: If no temperature compensation is selected during calibration,the temperature coefficient is not displayed in GLP.

Press GLP at any moment and the instrument will return tomeasurement mode.

If calibration has not been performed on the selected range,the instrument displays no CAL message blinking.

CAL

LOGGING FUNCTIONLOGGING FUNCTIONLOGGING FUNCTIONLOGGING FUNCTIONLOGGING FUNCTION

Up to 700 logged samples can be stored into memory.

200 manually logged records and 500 lot logging records can be storedin the memory. To select logging type enter SETUP menu.

LOGGING THE CURRENT DATALOGGING THE CURRENT DATALOGGING THE CURRENT DATALOGGING THE CURRENT DATALOGGING THE CURRENT DATA (manual logging)(manual logging)(manual logging)(manual logging)(manual logging)

Select the manual logging mode in SETUP menu.

To store the current reading into memory press LOG while the instrumentis in measurement mode.

The instrument will display MAn on the primary LCD, the record

number on the secondary LCD and LOG tag for a few seconds (seeexample below: record No. 15):

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If stability logging is selected, a complete set of data is memorized everytime the reading becomes stable after an unstable condition.

To stop interval logging press LOG key again. The LOG tag will becleared.

Note: When pressing any key that is not active, while lot logging isrunning, the following message is displayed for a few seconds.

followed by the number of free records:

If there are less than 6 memory locations remaining, the record numberand Lo message will be displayed to alert the user.

If the log space is full (200 records), FULL LOG message will be

displayed and no more data will be saved.

When LOG is pressed, a complete set of information is stored: date, time,pH, mV, EC, TDS, NaCl temperature and calibration data.

LOT LOGGINGLOT LOGGINGLOT LOGGINGLOT LOGGINGLOT LOGGING

Select StAb (stability logging) or the desired time interval.

To start interval logging press LOG key while the instrument is inmeasurement mode.

When the selected interval is reached or when the reading is stable (forlog on stability), the instrument will display the current lot number onthe primary LCD line, the record number on the secondary LCD line andthe LOG tag (see example below: Lot 5 record 7)

followed by the number of free records on the corresponding memoryspace.

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VIEW LOGGED DATAVIEW LOGGED DATAVIEW LOGGED DATAVIEW LOGGED DATAVIEW LOGGED DATA

Press the ALT&RCLkeys while in measurement mode to retrieve thestored information.

If no data was logged for the current selected measurement range andno lots are memorized, one of the next messages will be displayed:

No pH measurements records:

No Relative mV and mV records:

No EC records:

No TDS records:

No NaCl records:

Otherwise, the instrument will display the lot number on the primary LCDline, the number of records on the secondary, LOG tag and CFMblinking. If samples were logged on demand MAn will be displayed onthe primary LCD and the number of samples logged on the secondary(see example below: manual log, 15 samples logged).

Press ARROW keys to select different lot.

L OG mV

LOG

LOG

LOG

LOG

LOG

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In TDS measurement range:

In NaCl measurement range:

Use the ARROW keys to scroll through the records.

Press CFM to view record information.

IfRCL was entered while in pH measurement range:

In Rel mV range:

In EC measurement range:

pHLOG

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Note: The instrument will automatically skip log records from othermeasurement ranges.

To view additional information press RANGE:

For pH

The mV value on the primary LCD and the temperature value on thesecondary LCD.

TIMELOG

The time on the primary LCD, along with TIME tag and the recordnumber on the secondary LCD.

The date on the primary LCD, along with DATE tag.

The calibration offset on the primary LCD and OFS message onthe secondary LCD.

The calibration slope on the primary LCD and SLP message onthe secondary LCD.

The interval for lot logging.

To delete manual logged records: press CFM while MAn is displayed toview manually logged records. Press the CLR key, dEL and the recordnumber will be displayed. Press CFM to delete. Use the ARROW keys tochange the record number.

To delete a lot, use the ARROW keys to select the desired lot. Press CLRkey, dEL LOt will appear on the display. Press CFM key to delete.

mVLOG

%LOG

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The dEL message is displayed on the primary LCD and the selected recordon the secondary LCD, along with LOG tag.

The ARROW keys can be used to change the record or lot number.

Press SETUP to delete all records/lots. The display will show dEL inthe primary LCD and ALL in the secondary LCD.

Press CFM to confirm delete. While deleting the tag will blink.

Press CAL or RANGE or CLR to escape and return to the RCL screen.

If del ALL option was selected, all the log on demand records or lotsare deleted. While deleting the tag is displayed blinking.

Press ALT&RCL exit record information and enter lot information.

Press ALT&RCL again to return to measurement mode.

If one or more records/lots were deleted the tag blinks until thelog memory space is reorganized.

Note: If at least one record was deleted the log memory space will berecognized in about 4-5 seconds. During this period the willblink.

For Relative mV and mV Range

The temperature value, the mV absolute value, the time and thedate as described above.

The Relative mV offset.

For EC Range

The time and date as described on pH Range. The EC on primary LCD and temperature value on the secondary LCD.

The offset factor on the primary LCD and OFS message on thesecondary LCD.

mVLOG

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The cell constant on the primary LCD and CEL message on thesecondary LCD line.

The reference temperature on the primary LCD and rEFmessage on the secondary LCD.

The temperature coefficient on the primary LCD and tc messageon the secondary LCD.


For TDS Range The temperature reading as described in pH range.

The conductivity value on the primary LCD and the temperaturevalue on the secondary LCD.

The time and the date as described in pH Range.

The TDS factor on the primary LCD and cF message on thesecondary LCD.

The reference temperature, the temperature coefficient,the temperature compensation mode and the cell constant asdescribed in EC Range.

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For NaCl Range

The conductivity and temperature reading value as described in TDSRange.

The time and date as described in pH Range.

The salinity factor on the primary LCD and cF message on thesecondary LCD, with LOG and NaCl tags displayed.

The reference temperature, the temperature compensation modeand the cell constant message as described above.

Note: After LOG is pressed or dEL is confirmed, the instrument willdisplay the amount of free log space for about one second(example 25 records free).

Press the ALT&RCL keys to leave RECALL mode at any time.

NaClLOG

Note: When an information that does not display the record numberis selected, pressing the SETUP key will display the recordnumber on the secondary LCD line.

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SET UPSET UPSET UPSET UPSET UP

Setup mode allows viewing and modifying the following instrumentparameters.

In according with the selected range, SETUP menu allows the possibilityto view and /or change specific range parameters and common parameters(for all the ranges).

The common parameters are:

Log interval

Current Time (hour & minute)

Current Date (year, month & day)

Beep Status

Instrument Id

Temperature Unit

The specific parameters are:

In pH range

Expired Calibration Alarm

First Custom Buffer

Second Custom Buffer

One-point Calibration Behavior

pH Resolution

In EC/TDS/NaCl range

Cell Constant

TDS Factor

Temperature Compensation Coefficient

Reference Temperature

To enter SETUP mode press SETUPwhile the instrument is in measurementmode.

Select a parameter with the ARROW keys.

Press CAL to change a parameter value. The selected parameter willstart blinking.

Press RANGE to toggle between displayed parameters.

Press the ARROW keys to increase or decrease the displayed value.

Press CFM to save the modified value or CAL to escape without saving.

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EXPIRED CALIBRATION ALARMEXPIRED CALIBRATION ALARMEXPIRED CALIBRATION ALARMEXPIRED CALIBRATION ALARMEXPIRED CALIBRATION ALARM

Press CAL when the calibration time-out is displayed. Calibrationtime-out (OFF or 1 to 7 days) will start blinking.

Press the ARROWkeys to change the calibration time-out value.

Press CFM to save the modified calibration time-out value.

Press CAL to escape without saving.

LOG INTERVALLOG INTERVALLOG INTERVALLOG INTERVALLOG INTERVAL

Press CAL when log interval is displayed. The log interval is selectedblinking (MAn for log on demand, StAb log on stability, interval inseconds or minutes).

Press the ARROW keys to change the custom buffer value.

Press CFM to confirm the selection.


FIRST CUSTOM BUFFERFIRST CUSTOM BUFFERFIRST CUSTOM BUFFERFIRST CUSTOM BUFFERFIRST CUSTOM BUFFER

Press CAL when cb1 is displayed. The custom buffer (disabled noor 0 to 16 pH) will start blinking.


Press CFM to save the modified custom buffer value.


SECOND CUSTOM BUFFERSECOND CUSTOM BUFFERSECOND CUSTOM BUFFERSECOND CUSTOM BUFFERSECOND CUSTOM BUFFER

Press CAL when cb2 is displayed. The custom buffer (disabled no

or 0 to 16 pH) will start blinking.


Press CFM to save the modified custom buffer value.


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pH RESOLUTIONpH RESOLUTIONpH RESOLUTIONpH RESOLUTIONpH RESOLUTION

Press CAL when rES message is displayed on the secondary LCD. Theset resolution (0.1, 0.01 or 0.001) will start blinking.

Press the ARROW keys to toggle between 0.1, 0.01 and 0.001 options.Press CFM to save the modified value.


CURRENT TIMECURRENT TIMECURRENT TIMECURRENT TIMECURRENT TIME

Press CAL when the current time is displayed. The hour will start blinking.

Press the ARROWkeys to change the hour.

Press RANGE. The minutes will start blinking.

Press the ARROW keys to change the minutes.

Press CFM to save the modified value.


ONE-POINT CALIBRATION BEHAVIORONE-POINT CALIBRATION BEHAVIORONE-POINT CALIBRATION BEHAVIORONE-POINT CALIBRATION BEHAVIORONE-POINT CALIBRATION BEHAVIOR

Press CAL when 1 Pnt message is displayed on the secondary LCD.One of the two options (Pnt or OFFS) will start blinking (see pHCALIBRATION PROCEDURE for details, page 13).

Press the ARROW keys to toggle between Pnt and OFFS options.

Press CFM to save the behavior for one-point calibration.


Note: To remove a custom buffer from the calibration list enter custombuffer press CAL key then press CLR key. The nocb1 or cb2message will be displayed and the instrument return for theSETUP parameter scroll mode.

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BEEP STATUSBEEP STATUSBEEP STATUSBEEP STATUSBEEP STATUS

Press CAL when the beep status is displayed. Beep status (On orOFF) will start blinking.

Press the ARROWkeys to change the beep status (On or OFF).

Press CFM to save the modified beep status.


When enable, beep sounds as a short beep every time a key is pressed orwhen the calibration can be confirmed.

A long beep alert that the pressed key is not active or a wrong conditionis detected while in calibration.

CURRENT DATECURRENT DATECURRENT DATECURRENT DATECURRENT DATE

Press CAL when the current date is displayed. The year will start blinking.

Press the ARROWkeys to change the year.

Press RANGE. The month will start blinking.

Press the ARROWkeys to change the month.

Press RANGE. The day will start blinking.

Press the ARROW keys to change the day.

Press CFM to save the modified value.


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CELL CONSTANTCELL CONSTANTCELL CONSTANTCELL CONSTANTCELL CONSTANT

Press CAL when the cell constant is displayed. The cell constant will startblinking.

Press the ARROW keys to change the cell constant (0.500 to 1.700).

Press CFM to save the modified cell constant.


IIIIINSTRUMENT IDNSTRUMENT IDNSTRUMENT IDNSTRUMENT IDNSTRUMENT ID

Press CAL when InId is displayed. The instrument ID (0000 to9999) will start blinking.

Press the ARROWkeys to change the instrument ID value.

Press CFM to save the modified instrument ID value.


Note: The instrument ID is downloaded to a PC as part of a loggeddata, set to identify its origin.

TEMPERATURE UNITTEMPERATURE UNITTEMPERATURE UNITTEMPERATURE UNITTEMPERATURE UNIT

Press CAL when tnP is displayed. The temperature unit will startblinking.

Press the ARROW keys to change the option.

Press CFM to save the modified temperature unit.


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TDS FACTORTDS FACTORTDS FACTORTDS FACTORTDS FACTOR

Press CAL when tdS is displayed. The TDS factor will start blinking.

Press the ARROW keys to change the TDS factor (0.40 to 0.80).Press CFM to save the modified TDS factor.Press CAL to escape without saving.

TEMPERATURE COMPENSATION COEFFICIENTTEMPERATURE COMPENSATION COEFFICIENTTEMPERATURE COMPENSATION COEFFICIENTTEMPERATURE COMPENSATION COEFFICIENTTEMPERATURE COMPENSATION COEFFICIENT

Press CAL when the temperature compensation coefficient is displayed.The temperature compensation coefficient will start blinking.

Press the ARROW keys to change the temperature compensationcoefficient. (0.00 to 6.00 %/C).Press CFM to save the modified temperature compensation coefficient.


REFERENCE TEMPERATUREREFERENCE TEMPERATUREREFERENCE TEMPERATUREREFERENCE TEMPERATUREREFERENCE TEMPERATURE

Press CAL when the reference temperature is displayed. The referencetemperature will start blinking.

Press the ARROW keys to toggle between 20.0 C and 25.0 C referencetemperature value.

Press CFM to save the modified reference temperature value.


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The instrument has two temperature channels: one that measures thetemperature from the HI 7662 probe while the instrument is in pH/mVrange and the other that measures temperature from the EC probe whilethe instrument is in EC/TDS/NaCl range.

All the instruments are factory calibrated for temperature on both channels.

Hannas temperature probes are interchangeable and no temperaturecalibration is needed when they are replaced.

If the temperature measurements are inaccurate, temperature recalibrationshould be performed.

For an accurate recalibration, contact your dealer or the nearest HannaCustomer Service Center, or follow the instructions below.

Prepare a vessel containing ice and water and another one containinghot water (around 50 C). Place insulation material around the vesselsto minimize temperature changes.

Use a calibrated thermometer with a resolution of 0.1 C as areference thermometer. Connect the HI 7662 probe to the appropriatesocket for the pH temperature channel or the HI 76310 probe for theEC temperature channel.

With the instrument off, press and hold down the CFM & SETUPkeys, then power on the instrument to calibrate the pH temperature

channel or &RANGE keys and then power on the instrument tocalibrate the EC temperature channel. The CAL tag will appearand the secondary LCD will show 0.0 C.

Submerse the temperature probe (or EC probe) in the vessel with iceand water as near as possible to the calibrated thermometer. Allowa few seconds for the probe to stabilize.

Use the ARROW keys to set the reading on the secondary LCD to thatof ice and water, measured by the calibrated thermometer. Whenthe reading is stable and close to the selected calibration point,READY tag will appear and CFM tag will blink.

Press CFM to confirm. The secondary LCD will show 50.0 C.

TEMPERATURE CALIBRATIONTEMPERATURE CALIBRATIONTEMPERATURE CALIBRATIONTEMPERATURE CALIBRATIONTEMPERATURE CALIBRATION((((( fo r techn i cal personnel on l y fo r techn i cal personnel on l y fo r techn i cal personnel on l y fo r techn i cal personnel on l y fo r techn i cal personnel on l y )))))

CAL

CAL

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Submerse the temperature probe (or EC probe) in the second vesselas near as possible to the calibrated thermometer. Allow a fewseconds for the probe to stabilize.

Use the ARROW keys to set the reading on the secondary LCD to thatof the hot water.

When the reading is stable and close to the selected

calibration point, READY tag will appear andCFM tag will blink.

Press CFM to confirm. The instrument memorizecalibration and restart in measurement mode.

Note: If the reading is not close to the selected calibration point,WRONG tag will blink. Change the temperature probe (or ECprobe) and restart calibration.

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mmmmmV CALIBRATIONV CALIBRATIONV CALIBRATIONV CALIBRATIONV CALIBRATION((((( fo r techn i cal personnel on l y fo r techn i cal personnel on l y fo r techn i cal personnel on l y fo r techn i cal personnel on l y fo r techn i cal personnel on l y )))))

All the instruments are factory calibrated for mV.

Hannas ORP electrodes are interchangeable and no mV calibration is

needed when they are replaced.

If the mV measurements are inaccurate, mV recalibration should be

performed.

For an accurate recalibration, contact your dealer or the nearest Hanna

Customer Service Center or follow the instructions below.

A two-point calibration can be performed at 0.0 mV and 1800.0 mV.

Attach to the BNC connector a mV simulator with an accuracy of

0.1 mV.

With the instrument off, press and hold down the CAL & keys,then power on the instrument. The CAL tag will appear and thesecondary LCD will show 0.0 mV.

Set 0.0 mV on the simulator.

When the reading is stable and close to the selected calibration

point, READY tag will appear and CFM tag will blink.

Press CFM to confirm. The secondary LCD will display 1800 mV.

Set 1800.0 mV on the simulator.

When the reading is stable and close to the selected calibrationpoint, READY tag will appear and CFM tag will blink.

Press CFM to confirm. The instrumentmemorize calibration and

restart to measurement mode.

Notes: If the reading is not close to the selected calibration point,WRONG tag will blink. Verify calibration condition orcontact your vendor if you can not calibrate.

Pressing CAL key during calibration process the instrumentquit calibration mode and restart to measurement mode

without memorizing calibration.

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Data transmission from the instrument to the PC can be done withthe HI 92000 Windows compatible software (optional). HI 92000also offers graphing and on-line help feature.

Data can be exported to the most popular spreadsheet programs forfurther analysis.

To connect your instrument to a PC, use a standard USB cable connector.Make sure that your instrument is switched off and plug one connector tothe instrument USB socket and the other to the USB port of your PC.

Note: If you are not using Hanna Instruments HI 92000 software,please see the following instructions.

SENDING COMMANDS FROM PCSENDING COMMANDS FROM PCSENDING COMMANDS FROM PCSENDING COMMANDS FROM PCSENDING COMMANDS FROM PC

It is also possible to remotely control the instrument with any terminalprogram. Use a standard USB cable to connect the instrument to a PC,start the terminal program and set the communication options as follows:8, N, 1, no flow control, 9600 baud rate.

COMMAND TYPESCOMMAND TYPESCOMMAND TYPESCOMMAND TYPESCOMMAND TYPES

To send a command to the instrument the scheme is:

where: is a selectable ASCII characterbetween 0 and 47.

is the command code (3 characters).

Note: Either small or capital letters can be used.

SIMPLE COMMANDSSIMPLE COMMANDSSIMPLE COMMANDSSIMPLE COMMANDSSIMPLE COMMANDS

RNG Is equivalent to pressing RANGE

CAL Is equivalent to pressing CAL

CFM Is equivalent to pressing CFM

UPC Is equivalent to pressing the UP arrow key

DWC Is equivalent to pressing the DOWN arrow key

SET Is equivalent to pressing SETUP

LOG Is equivalent to pressing LOGMOD Is equivalent to pressing MODE

GLP Is equivalent to pressing GLP

CLR Is equivalent to pressing CLR

RCL Is equivalent to pressing RCL

PC INTERFACEPC INTERFACEPC INTERFACEPC INTERFACEPC INTERFACE

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CHRxx Change the instrument range according with the parametervalue (xx):

xx=00 pH range/0.001 resolution



xx=03 mV range

xx=04 Relative mV range

xx=06 EC range

xx=07 TDS range

xx=08 NaCl rangeThe instrument sends the ACK (6) character every time a command isrecognized and a NAK (21) character for invalid commands.

COMMANDS REQUIRING AN ANSWERCOMMANDS REQUIRING AN ANSWERCOMMANDS REQUIRING AN ANSWERCOMMANDS REQUIRING AN ANSWERCOMMANDS REQUIRING AN ANSWER

RAS Causes the instrument to send a complete set of readings inaccording with the current range:

pH, mV and temperature reading on pH range.

mV and temperature reading on mV range.

Rel mV, absolute mV and temperature reading onRel mV range.

Conductivity and temperature reading on EC range.

TDS and temperature reading on TDS range.

NaCl and temperature reading on NaCl range.

The answer string contains:

Meter mode (2 chars):

00 - pH range (0.001 resolution)



03 - mV range

04 - Rel mV range

06 - EC range

07 - TDS range

08 - NaCl range

Meter status (2 chars of status byte): represents a 8bit hexadecimal encoding.

0x10 - temperature probe is connected

0x01 - new GLP data available

0x02 - new SETUP parameter

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Reading status (2 chars): R - in range, O - overrange, U - under range. First character correspondsto the appropriate range reading. Second charactercorresponds to mV reading (if exist).

Primary reading (corresponding to the selected range)- 7 ASCII chars, including sign and decimal point.

Secondary reading (only when primary reading is not

mV, EC, NaCl, TDS) - 7 ASCII chars, including sign and

decimal point.

Temperature reading - 8 ASCII chars, with sign and

two decimal points, always in C.MDR Requests the instrument model name and firmware code.

GLP Requests the calibration data record.


GLP status (1 char): represents a 4 bit hexadecimal

encoding.

0x01 - pH calibration available

0x02 - Rel mV calibration available

0x04 - EC calibration available

0x08 - NaCl calibration available

pH calibration data (if available), which contains:

the number of calibrated buffers (1 char) the offset, with sign and decimal point (7 chars)

the average of slopes, with sign and decimal point

(7 chars)

the calibration time, yymmddhhmmss (12 chars)

buffers information (for each buffer)

type (1 char): 0 - standard, 1 - custom

status (1 char): N (new) - calibrated in last

calibration; O (old) - from an old calibration.

warnings during calibration (2 chars): 00 - no

warning, 04 - Clean Electrode warning.

buffer value, with sign and decimal point(7 chars).

the calibration time,yymmddhhmmss (12 chars).

Rel mV calibration data (if available), which contains:

the calibration offset, with sign (7 chars)

the calibration time,yymmddhhmmss (12 chars).

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EC calibration data (if available), which contains:

the number of calibrated standards (1 char)

the offset factor, with sign and decimal point

(7 chars)

the cell constant, with sign and decimal point

(7 chars)

the calibration time, yymmddhhmmss (12 chars)

standards information (for each standard)

standard value, with sign and decimal point

(7 chars). buffer unit (2 chars; 00-S; 01-mS)

Reference Temperature with and decimal point

(4 chars)

Temperature Compensation mode (2 chars)

00 - no temperature compensation

01 - automatic temperature compensation

00 - manual temperature compensation

TC coeficient with sign and decimal point (4 chars)

calibration time,yymmddhhmmss(12 chars).

Na Cl Calibration data

the number of calibrated data (1 char) salinity coeficient, with sign and decimal point

(7 chars)

Cell constant, with sign and decimal point(2 chars)

the calibration time (2 chars)

buffer information, for each buffer:

Reference Temperature with and decimal point

(4 chars)

Temperature Compensation mode (2 chars)

00 - no temperature compensation

01 - automatic temperature compensation

00 - manual temperature compensation

TC coeficient with sign and decimal point (4 chars)

calibration time,yymmddhhmmss(12 chars).

PAR Requests the setup parameters setting.


Instrument ID (4 chars)

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Calibration alarm time out for pH range (2 chars)

SETUP information (2 chars): 8 bit hexadecimalencoding.

0x01 - beep ON (else OFF)

0x04 - degrees Celsius (else degrees Fahrenheit)

0x08 - Offset calibration (else Point calibration)

The number of custom buffers (1 char)

The custom buffer values, with sign and decimalpoint, for each defined custom buffer (7 chars)

Log type 2 chars

01 - manual log

02 - stability lot log

03 to 14 - the coresponding interval for lot log (5 sto 180 min)

cell constant, with sign and decimal point (6 chars)

TDS factor, with sign and decimal point (5 chars)

TC coef, with sign and decimal point (5 chars)

Reference Temperature, with sign and decimal point(5 chars)

Temperature Compensation mode (1 char)

NSLx Requests the number of logged samples.

x = P - request for pH range

M - request for mV range

E - request for EC range

N - request for NaCl range

T - request for TDS range

LODxnnn: request thennn record of the manual log on the x range

LODxALLff: groups all Log On Demand Records in frames of 8 recordseach for the selected range

Command Parameters:

x - range (see Note)

ALL - download all records for the selected range

ff - requested frame number - first frame is labeled 01LLsxff: requests information about all lots on the specified range, it sendsthe information in frames of 10 lots each (a frame contains informationabout 10 lots)

Command Parameters:

x - range (see Note)

ff - requested frame number - first frame is labeled 01

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GLDxxxff: Requests the records of the xxx lot number. The records aresent in frames of 10 records; ff is the frame number (01 firstframe). (Example: Lot 13 has 53 records. The records will besent in 6 frame, 5 with10 records and 1 with 3 records.)

Command Parameters:

xxx - Lot number (eq: for lot number 1 xxx = 001)

ff - requested frame number - first frame is labeled 01

Errors: Err3 log on demand empty.

Err4 requested set parameter is not available.

Err5 command argument is wrong.

Err6 requested range not available.

Err7 meter in log mode.

Err8 is sent if instrument is not in measurement mode.

NAK (21) character is sent when the instrument receivesan unknown or a corrupted command.

Note: P - request for pH range.

M - request for mV range.

E - request for EC range.

T - request for TDS range.

N - request for NaCl range.

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PREPARATION PROCEDUREPREPARATION PROCEDUREPREPARATION PROCEDUREPREPARATION PROCEDUREPREPARATION PROCEDURE

Remove the protective cap of the pH electrode.

DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normalwith electrodes. They will disappear when rinsed with water.

During transport, tiny bubbles of air may form inside the glass bulb

affecting proper functioning of the electrode. These bubbles can beremoved by shaking down the electrode as you would do with a glassthermometer.

If the bulb and/or junction is dry, soak the electrode in HI 70300 orHI 80300Storage Solution for at least one hour.

ELECTRODE CONDIT IONINGELECTRODE CONDIT IONINGELECTRODE CONDIT IONINGELECTRODE CONDIT IONINGELECTRODE CONDIT IONING& MAINTENANCE& MAINTENANCE& MAINTENANCE& MAINTENANCE& MAINTENANCE

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For refillable electrodes:For refillable electrodes:For refillable electrodes:For refillable electrodes:For refillable electrodes:

If the filling solution (electrolyte) is more than 2 cm (1) below the fillhole, add HI 7082 or HI 8082 3.5M KCl Electrolyte Solution for doublejunction or HI 7071 or HI 8071 3.5M KCl+AgCl Electrolyte Solution forsingle junction electrodes.

For faster response, unscrew the fill hole screw during measurements.

For AMPHELFor AMPHELFor AMPHELFor AMPHELFor AMPHEL electrodes:electrodes:electrodes:electrodes:electrodes:

If the electrode does not respond to pH changes, the battery is run downand the electrode should be replaced.

MEASUREMENTMEASUREMENTMEASUREMENTMEASUREMENTMEASUREMENT

Rinse the pH electrode tip with distilled water. Submerse the tip (3 cm /1)in the sample and stir gently for a few seconds.

For a faster response and to avoid cross-contamination of the samples,rinse the electrode tip with a few drops of the solution to be tested, beforetaking measurements.Take care that the sleeve holes of the EC probe are completely submersed.Tap the probe repeatedly to remove air bubbles that may be trappedinside the sleeve.

STORAGE PROCEDURESTORAGE PROCEDURESTORAGE PROCEDURESTORAGE PROCEDURESTORAGE PROCEDURE

To minimize clogging and assure a quick response time, the glass bulband the junction of pH electrode should be kept moist and not allowed todry out.

Replace the solution in the protective cap with a few drops ofHI 70300or HI 80300 Storage Solution or, in its absence, Filling Solution(HI 7071 or HI 8071 for single junction and HI 7082 or HI 8082 fordouble junction electrodes). Follow the Preparation Procedure on page53 before taking measurements.

Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER.

PERIODIC MAINTENANCEPERIODIC MAINTENANCEPERIODIC MAINTENANCEPERIODIC MAINTENANCEPERIODIC MAINTENANCE

Inspect the electrode and the cable. The cable used for connection to theinstrument must be intact and there must be no points of brokeninsulation on the cable or cracks on the electrode stem or bulb. Connectorsmust be perfectly clean and dry. If any scratches or cracks are present,replace the electrode. Rinse off any salt deposits with water.

pH Electrode MaintenanceFor refillable electrodes:For refillable electrodes:For refillable electrodes:For refillable electrodes:For refillable electrodes:

Refill the reference chamber with fresh electrolyte (HI 7071 or HI 8071 forsingle junction and HI 7082 or HI 8082 for double junction electrodes).

Allow the electrode to stand upright for 1 hour.

Follow the Storage Procedure above.

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pHpHpHpHpH ELECTRODE CLEANING PROCEDUREELECTRODE CLEANING PROCEDUREELECTRODE CLEANING PROCEDUREELECTRODE CLEANING PROCEDUREELECTRODE CLEANING PROCEDURE

General Soak in Hanna HI 7061 or HI 8061 General CleaningSolution for approximately hour.

Protein Soak in Hanna HI 7073 or HI 8073 Protein CleaningSolution for 15 minutes.

Inorganic Soak in Hanna HI 7074 Inorganic Cleaning Solutionfor 15 minutes.

Oil/grease Rinse with Hanna HI 7077 or HI 8077 Oil and FatCleaning Solution.

IMPORTANT: After performing any of the cleaning procedures, rinse theelectrode thoroughly with distilled water, refill the reference chamberwith fresh electrolyte (not necessary for gel-filled electrodes) and soak theelectrode in HI 70300 or HI 80300 Storage Solution for at least 1 hourbefore taking measurements.

EC Probe MaintenanceEC Probe MaintenanceEC Probe MaintenanceEC Probe MaintenanceEC Probe Maintenance

Rinse the probe with clean water after measurements. If a more thoroughcleaning is required, remove the probe sleeve and clean the probe witha cloth or a nonabrasive detergent. Make sure to reinsert the sleeve ontothe probe properly and in the right direction. After cleaning the probe,recalibrate the instrument.

The platinum rings support is made of glass. Take great care whilehandling the probe.

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TROUBLESHOOTING GUIDETROUBLESHOOTING GUIDETROUBLESHOOTING GUIDETROUBLESHOOTING GUIDETROUBLESHOOTING GUIDE

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Typical Electrode Life

Ambient Temperature 1 3 years

90 C Less than 4 months

120 C Less than 1 month

Alkaline Error

High concentrations of sodium ions interfere with readings in alkalinesolutions. The pH at which the interference starts to be significantdepends upon the composition of the glass. This interference is calledalkaline error and causes the pH to be underestimated. Hannas glassformulations have the indicated characteristics.

The resistance of glass electrodes partially depends on the temperature.The lower the temperature, the higher the resistance. It takes more timefor the reading to stabilize if the resistance is higher. In addition, theresponse time will suffer to a greater degree at temperatures below 25 C.

Since the resistance of the pH electrode is in the range of 50 200 Mohm,the current across the membrane is in the pico Ampere range. Largecurrents can disturb the calibration of the electrode for many hours.

For these reasons high humidity environments, short circuits and staticdischarges are detrimental to a stable pH reading.

The pH electrodes life also depends on the temperature. If constantlyused at high temperatures, the electrode life is drastically reduced.

TEMPERATURE CORRELATIONTEMPERATURE CORRELATIONTEMPERATURE CORRELATIONTEMPERATURE CORRELATIONTEMPERATURE CORRELATIONFORFORFORFORFOR ppppp H SENSITIVE GLASSH SENSITIVE GLASSH SENSITIVE GLASSH SENSITIVE GLASSH SENSITIVE GLASS

1.0 Mol L-1 Na+

0.1 Mol L-1 Na+

Sodium Ion Correction for the Glass at 20-25 CConcentration pH Error

13.0013.5014.0012.5013.0013.5014.00

0.100.140.200.100.180.290.40

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pH BUFFER SOLUTIONS

HI 70004P pH 4.01 Buffer Sachets, 20 mL, 25 pcsHI 70007P pH 7.01 Buffer Sachets, 20 mL, 25 pcsHI 70010P pH 10.01 Buffer Sachets, 20 mL, 25 pcsHI 7001L pH 1.68 Buffer Solution, 500 mLHI 7004L pH 4.01 Buffer Solution, 500 mLHI 7006L pH 6.86 Buffer Solution, 500 mLHI 7007L pH 7.01 Buffer Solution, 500 mL

HI 7009L pH 9.18 Buffer Solution, 500 mLHI 7010L pH 10.01 Buffer Solution, 500 mLHI 8004L pH 4.01 Buffer Solution in FDA approved bottle, 500 mLHI 8006L pH 6.86 Buffer Solution in FDA approved bottle, 500 mLHI 8007L pH 7.01 Buffer Solution in FDA approved bottle, 500 mLHI 8009L pH 9.18 Buffer Solution in FDA approved bottle, 500 mLHI 8010L pH 10.01 Buffer Solution in FDA approved bottle, 500 mL

pH ELECTRODE STORAGE SOLUTIONS

HI 70300L Storage Solution, 500 mLHI 80300L Storage Solution in FDA approved bottle, 500 mL

CLEANING SOLUTIONS

HI 7061M General Cleaning Solution, 250 mL bottleHI 7061L General Cleaning Solution, 500 mL bottleHI 8061M General Cleaning Solution, 250 mL bottle FDA approved bottleHI 8061L General Cleaning Solution, 500mL bottle FDA approved bottleHI 70000P Electrode Rinse Sachets, 20 mL, 25 pcsHI 7073L Protein Cleaning Solution, 500 mLHI 7074L Inorganic Cleaning Solution, 500 mLHI 7077L Oil & Fat Cleaning Solution,500 mLHI 8073L Protein Cleaning Solution in FDA approved bottle, 500 mLHI 8077L Oil & Fat Cleaning Solution in FDA approved bottle, 500 mL

pH ELECTRODE REFILL ELECTROLYTE SOLUTIONS

HI 7071 3.5M KCl + AgCl Electrolyte, 4x30 mL, for single junction

electrodesHI 7072 1M KNO3

Electrolyte, 4x30 mLHI 7082 3.5M KCl Electrolyte, 4x30 mL, for double junction electrodesHI 8071 3.5M KCl + AgCl Electrolyte in FDA approved bottle, 4x30 mL,

for single junction electrodesHI 8072 1M KNO

3Electrolyte in FDA approved bottle, 4x30 mL

HI 8082 3.5M KCl Electrolyte in FDA approved bottle, 4x30 mL, fordouble junction electrodes

ACCESSORIESACCESSORIESACCESSORIESACCESSORIESACCESSORIES

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ORP PRETREATMENT SOLUTIONS

HI 7091L Reducing Pretreatment Solution, 500 mLHI 7092L Oxidizing Pretreatment Solution, 500 mL

CONDUCTIVITY SOLUTIONS

HI 70030P 12880 S/cm (mho/cm), 20 mL sachets (25 pcs.)HI 70031P 1413 S/cm (mho/cm), 20 mL sachets (25 pcs.)HI 70033P 84 S/cm (mho/cm), 20 mL sachets (25 pcs.)HI 70039P 5000 S/cm (mho/cm), 20 mL sachets (25 pcs.)HI 7030M 12880 S/cm (mho/cm), 250 mL bottleHI 7031M 1413 S/cm (mho/cm), 250 mL bottleHI 7033M 84 S/cm (mho/cm), 250 mL bottleHI 7030M 12880 S/cm (mho/cm), 250 mL bottleHI 7034M 80000 S/cm (mho/cm), 250 mL bottleHI 7035M 111800 S/cm (mho/cm), 250 mL bottleHI 7039M 5000 S/cm (mho/cm), 250 mL bottleHI 7030L 12880 S/cm (mho/cm), 500 mL bottleHI 7031L 1413 S/cm (mho/cm), 500 mL bottleHI 7033L 84 S/cm (mho/cm), 500 mL bottleHI 7034L 80000 S/cm (mho/cm), 500 mL bottleHI 7035L 111800 S/cm (mho/cm), 500 mL bottleHI 7039L 5000 S/cm (mho/cm), 500 mL bottleHI 7037L 100% NaCl sea water standard solution, 500 mL bottle

HI 8030L 12880 S/cm (mho/cm), 500 mL FDA approved bottleHI 8031L 1413 S/cm (mho/cm), 500 mL FDA approved bottleHI 8033L 84 S/cm (mho/cm), 500 mL FDA approved bottleHI 8034L 80000 S/cm (mho/cm), 500 mL FDA approved bottleHI 8035L 111800 S/cm (mho/cm), 500 mL FDA approved bottleHI 8039L 5000 S/cm (mho/cm), 500 mL FDA approved bottle

TDS SOLUTIONS

HI 70080C 800 ppm (mg/L), 20 mL (25 pcs.)HI 70080P 800 ppm (mg/L), 20 mL (25 pcs.)HI 70032C 1382 ppm (mg/L), 20 mL (25 pcs.)HI 70032P 1382 ppm (mg/L), 20 mL (25 pcs.)HI 77300C 1382 ppm (mg/L) & pH 7.01, 20 mL (10 pcs.)

HI 77300P 1382 ppm (mg/L) & pH 7.01 20 mL (10 pcs.)HI 70442C* 1500 ppm (mg/L) , 20 mL (25 pcs.)HI 70442P* 1500 ppm (mg/L) , 20 mL (25 pcs.)HI 77200C* 1500 ppm (mg/L) & pH 7.01, 20 mL (10 pcs.)HI 77200P* 1500 ppm (mg/L) & pH 7.01, 20 mL (10 pcs.)HI 7032M 1382 ppm (mg/L) , 250 mLHI 7032L 1382 ppm (mg/L) , 500 mL

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HI 70442M* 1500 ppm (mg/L), 250 mLHI 70442L* 1500 ppm (mg/L), 500 mL* 1500 ppm TDS have an approximate conversion factor of:

0.65 ppm = 1 S/cm conversion rate.

pH ELECTRODES

All electrodes part numbers ending in B are supplied with a BNC connectorand 1 m (3.3') cable, as shown below :

HI 1043BGlass-body, double junction, refillable, combination pH electrode.

Use: strong acid/alkali.

HI 1053B

Glass-body, triple ceramic, conic shape, refillable, combination pHelectrode.

Use: emulsions.

HI 1083B

Glass-body, micro, Viscolene, non-refillable, combination pH electrode.

Use: biotechnology, micro titration.

HI 1131B

Glass-body, single junction, refillable, combination pH electrode.

Use: general purpose.

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HI 1330B

Glass-body, semimicro, single junction, refillable, combination pH electrode.

Use: laboratory, vials.

HI 1331B

Glass-body, semimicro, single junction, refillable, combination pH electrode.

Use: flasks.

HI 1230B

Plastic-body (PES), double junction, gel-filled, combinationpH electrode.

Use: general, field.

HI 2031B

Glass-body, semimicro, conic, refillable, combination pH electrode.

Use: semisolid products.

HI 1332B

Plastic-body (PES), double junction, refillable, combination pH electrode.Use: general purpose.

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FC 100B

Plastic-body (PVDF), double junction, refillable, combination pH electrode.

Use: general purpose for food industry.

FC 200B

Plastic-body (PVDF), open junction, conic, Viscolene, non-refillable,

combination pH electrode. Use: meat & cheese.

FC 210B

Glass-body, double junction, conic, Viscolene, non-refillable, combinationpH electrode. Use: milk, yogurt.

FC 220B

Glass-body, triple-ceramic, single junction, refillable, combination pHelectrode. Use: food processing.

FC 911B

Plastic-body (PVDF), double junction, refillable with built-in amplifier,combination pH electrode. Use: very high humi

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